Comment 9 for bug 1964711

After the things I did in https://bugs.launchpad.net/ubuntu/+source/linux-hwe-5.13/+bug/1964711/comments/7, I am now facing a worse problem.

My computer no longer recognizes my display correctly. Since the boot screen, the resolution is the minimum available (1024x768). I think my system no longer selects the correct driver for my graphics card.

Running "sudo lshw -c video" yields the following:

```
  *-display UNCLAIMED
       description: VGA compatible controller
       product: Navi 10 [Radeon RX 5600 OEM/5600 XT / 5700/5700 XT]
       vendor: Advanced Micro Devices, Inc. [AMD/ATI]
       physical id: 0
       bus info: pci@0000:03:00.0
       version: ca
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi vga_controller bus_master cap_list
       configuration: latency=0
       resources: memory:40000000-4fffffff memory:50000000-501fffff ioport:3000(size=256) memory:50300000-5037ffff memory:c0000-dffff
```

Running "lsmod | grep amd" prints nothing (it used to before) and "dkms status amdgpu" also prints nothing. I tried uninstalling the drivers I installed and also tried installing drivers from different source. I tried to look for issues in my BIOS settings. All to no avail. If I don’t find a solution to this, I will resort to completely re-installing Ubuntu 20.04. I have luckily completed a full backup before.

**Update**:

Running "sudo modprobe amdgpu" seems to load the amdgpu driver correctly. Afterwards, I can log-in while the display being correctly connected and using the right resolution. I then proceeded to check the "/etc/modprobe.d" directory and found that there was a "/etc/modprobe.d/blacklist-amdgpu.conf" file. I moved it out of that directory and restarted. While my boot screen for my encrypted disk now still uses the lower resolution, at least my login screen is back to the before state.

I’d love to know what happened here and whether I can get the correct driver to be loaded on boot, too.